How do I remove the main blog from the blog directory?

(Tried to post three times, hopefully this is the only one that makes it onto the forum…)

I’m looking for a way to remove the main blog from the directory listing, as it simply links back to the home page.

I’ve looked at blogs-loop.php in the bp-member theme but don’t know how to identify it to remove it…..at some stage I’d like to identify blogs and remove them from the directory even though they are active but that’s probably asking for too much….